25-12 Cal883301A & Cal883220A Nutrient Reduction Wetlands

The contracts Cal883301A and Cal883220A involve comprehensive earthwork, grading, and drainage improvements aimed at nutrient reduction wetlands in Iowa. The Cal883301A project entails extensive excavation, clearing, grading, and installation of tile and outlet structures, along with pump systems powered by solar panels and controls. It includes approximately 15,752 cubic yards of earthwork, over 1,200 linear feet of tile installation, riprap placement, seeding, and pavement replacement, with an estimated cost between $300,000 and $400,000. The project is scheduled for completion by September 1, 2026, with seeding finishing by September 15, 2026. The Cal883220A project is somewhat smaller, focusing on similar activities such as clearing, grading, tile installation, riprap placement, and seeding, but with reduced quantities—around 1,775 cubic yards of earthwork, 172 linear feet of tile, and 218 tons of riprap. It also includes the installation of a tied concrete block mat, concrete structures, and a pump system with solar panels. The estimated cost ranges from $200,000 to $260,000, with completion dates set for June 15, 2026, for all work except seeding, which is due by June 30, 2026. Both projects are part of a solicitation issued by the Iowa Department of Agriculture and Land Stewardship, with a response deadline of October 8, 2025.